64566-32-1

Basic information

• Product Name: (3aR,4S,7R,7aS)-3a,4,7,7a-tetrahydro-4,7-epoxy-2-benzothiophene-1,3-dione
• CAS NO: 64566-32-1
• Molecular Formula: C₈H₆O₃S
• Molecular Weight: 182.1964
• Mol File: 64566-32-1.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 281.3°C at 760 mmHg
• Flash Point: 138.4°C
• Density: 1.567g/cm³
• Vapor Pressure: 0.00358mmHg at 25°C
• Refractive Index: 1.654
• CAS DataBase Reference: (3aR,4S,7R,7aS)-3a,4,7,7a-tetrahydro-4,7-epoxy-2-benzothiophene-1,3-dione(CAS DataBase Reference)
• NIST Chemistry Reference: (3aR,4S,7R,7aS)-3a,4,7,7a-tetrahydro-4,7-epoxy-2-benzothiophene-1,3-dione(64566-32-1)
• EPA Substance Registry System: (3aR,4S,7R,7aS)-3a,4,7,7a-tetrahydro-4,7-epoxy-2-benzothiophene-1,3-dione(64566-32-1)

Safety Data

• Hazardous Substances Data: 64566-32-1(Hazardous Substances Data)

Upstream product

• 6118-51-0 exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride 

Relevant articles and documents

Synthesis of Small-Medium Ring Thioanhydrides

Reaction of five-membered ring anhydrides with sodium sulfide has previously been employed for synthesis of the corresponding thioanhydrides in low yields.Re-examination of the stoichiometry reveals reaction of cyclic anhydride with sodium sulfide (2:1 respectively), affords the thioanhydride accompanied by the corresponding dicarboxylate in a 1:1 molar ratio.The mechanistic pathway for this reaction has also been elucidated.Optimization of reaction conditions has resulted in the synthesis of a variety of four to seven-membered ring thioanhydride in yields approaching theoretical.